DATAS SEGMENT
BUFFER DB 20 DUP(0)
BUFFER1 DB 20 DUP(0)
MSG1 DB "Please input you want choose number: $"
MSG2 DB "1: eg:A to a exchange : Uppercase to lowercase $"
MSG3 DB "2: eg:a to A exchange : Lowercase to Uppercase $"
MSG4 DB "3: eg:1111 to f : Binary to Hexadecimal $"
MSG5 DB "4: eg:f to 1111 : Hexadecimal to Binary $"
MSG6 DB "5: eg:f to 15 : Hexadecimal to Decimal $"
MSG7 DB "PLEASE INPUT SOME ALPHABET:$"
MSG8 DB "PLEASE INPUT SOME BINARY NUMBER:$"
MSG9 DB "PLEASE INPUT SOME HEX NUMBER:$"
DATAS ENDS
STACKS SEGMENT
STACKS ENDS
CODES SEGMENT
ASSUME CS:CODES,DS:DATAS,SS:STACKS
START: MOV AX,DATAS
MOV DS,AX
P: CALL MENU ;子程序调用
CMP AL,'1'
JZ A ; 若 AL=1,则转到A
CMP AL,'2'
JZ B ; 若AL=2，则转到B
CMP AL,'3'
JZ CA
CMP AL,'4'
JNZ LO
JMP D
LO: CMP AL,'5'
JNZ EXIT1
JMP asd
EXIT1:JMP EXIT
A: CALL CLEAR ;子程序调用
MOV AH,02 ;设置光标位置
MOV DH,3
MOV DL,2
INT 10H ;中断指令
MOV SI,OFFSET MSG7 ;取MSG7的地址指针送入SI
MOV DX,SI
MOV AH,09 ;；显示一个字符串
INT 21H
LEA SI,BUFFER ;取BUFFER的有效地址给SI
S: MOV AH,01 ;；输入一个字符
INT 21H
MOV [SI],AL
INC SI
CMP AL,0DH ;；回车
JNZ S ; ；若不输入回车，则继续执行S
CALL CRLF
MOV AH,02 ; ；设置光标位置
MOV DH,5
MOV DL,28
INT 10H
LEA SI,BUFFER
Q: MOV AL,[SI]
CMP AL,'a'
JNB E ; ；若AL的内容低于‘A’则转到E
ADD AL,20H ; ；AL加上20H，大写字母转换为小写字母
E: MOV DL,AL
MOV AH,02 ; ；显示一个字符
INT 21H
INC SI
MOV AL,[SI]
CMP AL,0DH
JNZ Q ; ；若不输入回车的话，则继续执行Q
MOV AH,01
INT 21H
CMP AL,0DH
JZ P ; ；若输入回车，则返回P
JMP EXIT
B: CALL CLEAR ;调用子程序
MOV AH,02
MOV DH,3
MOV DL,2
INT 10H
MOV SI,OFFSET MSG7
MOV DX,SI
MOV AH,09 ; ；显示一个字符串
INT 21H
LEA SI,BUFFER
M: MOV AH,01
INT 21H
MOV [SI],AL
INC SI
CMP AL,0DH
JNZ M ; ；若不输入回车，则继续执行M
CALL CRLF
MOV AH,02 ; ；设置光标位置
MOV DH,5
MOV DL,28
INT 10H
LEA SI,BUFFER
I: MOV AL,[SI]
CMP AL,5AH
JNGE X ; ；若AL的内容低于‘Z’，则转到X
SUB AL,20H ; ；小写字母转换为大写字母
X: MOV DL,AL
MOV AH,02
INT 21H
INC SI
MOV AL,[SI]
CMP AL,0DH
JNZ I
MOV AH,01 ; ；输入一个字符
INT 21H
CMP AL,0DH
JNZ EXIT0 ; ；若不输入回车，则转到EXIT0出
JMP P
EXIT0:JMP EXIT
CA: CALL CLEAR
MOV AH,02 ;；设置光标位置
MOV DH,3
MOV DL,2
INT 10H
MOV SI,OFFSET MSG8
MOV DX,SI
MOV AH,09
INT 21H
LEA SI,BUFFER
NAA: MOV AH,01
INT 21H
MOV [SI],AL
INC SI
CMP AL,0DH
JNZ NAA
CALL CRLF
LEA DI,BUFFER
MOV AH,02
MOV DH,5
MOV DL,28
INT 10H
Y: MOV AL,[DI]
SUB AL,30H ;；将ASCII码转换为二进制
MOV BL,8D
MUL BL
ADD AL,30H
MOV DL,0
ADD DL,AL
INC DI
MOV AL,[DI]
SUB AL,30H
MOV BL, 4D
MUL BL
ADD DL,AL
INC DI
MOV AL,[DI]
SUB AL,30H
MOV BL,2D
MUL BL
ADD DL,AL
INC DI
MOV AL,[DI]
SUB AL,30H
MOV BL,1D
MUL BL
ADD DL,AL
CMP DL,'9'
JNG T
ADD DL,'A'-':'
T: MOV AH,02
INT 21H
INC DI
MOV AL,[DI]
CMP AL,0DH
JNZ Y
MOV AH,01
INT 21H
CMP AL,0DH
JNZ EXIT
JMP P
D: CALL CLEAR
MOV AH,02
MOV DH,3
MOV DL,2
INT 10H
MOV SI,OFFSET MSG9
MOV DX,SI
MOV AH,09
INT 21H
LEA SI,BUFFER
asd: CALL CLEAR
MOV AH,02
MOV DH,3
MOV DL,2
INT 10H
MOV SI,OFFSET MSG9
MOV DX,SI
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
MOV AH,09
INT 21H
LEA SI,BUFFER
FF: MOV AH,01
INT 21H
MOV [SI],AL
INC SI
CMP AL,0DH
JNZ FF
CALL CRLF
LEA SI,BUFFER
MOV DI,OFFSET BUFFER1
RE: MOV AL,[SI]
CMP AL,'9'
JNG Z
SUB AL,'A'-':'
Z: SUB AL,30H
MOV CX,4
ADD DI,4
YU: CBW
MOV BL,2D
DIV BL
MOV [DI],AH
PUSH AX
ADD AH,30H ; ; 二进制转化为ASCII码
POP AX
DEC DI
LOOP YU
ADD DI,4
INC SI
MOV AL,[SI]
CMP AL,0DH
JNZ RE
INC DI
MOV AL,'$'
MOV [DI],AL
CALL CRLF
MOV SI,OFFSET BUFFER1+1
MOV AL,[SI]
RT: ADD AL,30H
MOV DL,AL
MOV AH,02
INT 21H
INC SI
MOV AL,[SI]
CMP AL,'$'
JNZ RT
MOV AH,01
INT 21H
CMP AL,0DH
JNZ EXIT
JMP P
EXIT: MOV AH,4CH
INT 21H ;返回DOS系统
MENU PROC NEAR
CALL CLEAR ;调用子程序
MOV AH,02 ;设置光标位置
MOV DH,5 ;第5行
MOV DL,25 ;第25列
INT 10H
LEA SI,MSG2
MOV DX,SI
MOV AH,09 ;显示MSG2的内容
INT 21H ;输出MSG2字符串
MOV AH,02 ;至光标位置
MOV DH,7 ;第7行
MOV DL,25 ;第25列
INT 10H
LEA SI,MSG3 ;取MSG3的有效地址
MOV DX,SI
MOV AH,09
INT 21H ;输出MSG3字符串
MOV AH,02
MOV DH,9 ;第9行
MOV DL,25 ;第25列
INT 10H
LEA SI,MSG4 ;取MSG4的有效地址
MOV DX,SI
MOV AH,09
INT 21H ;输出MSG4字符串
MOV AH,02
MOV DH,11 ;第11行
MOV DL,25 ;第25列
INT 10H
LEA SI,MSG5
MOV DX,SI
MOV AH,09
INT 21H ;输出MSG5字符串
MOV AH,02 ;至光标位置
MOV DH,13 ;第15列
MOV DL,25 ;第17列
INT 10H
LEA SI,MSG6
MOV DX,SI
MOV AH,09
INT 21H ;输出MSG6字符串
MOV AH,02 ;至光标位置
MOV DH,19 ;第19列
MOV DL,25 ;第25列
INT 10H
LEA SI,MSG1
MOV DX,SI
MOV AH,09
INT 21H ;输出MSG1字符串
MOV AH,01 ;键盘输入
INT 21H
RET ;返回
MENU ENDP
CLEAR PROC NEAR
PUSH AX
PUSH BX
PUSH CX
PUSH DX
PUSH SI
PUSH DI
MOV AH,07 ;屏幕初始化或下卷
MOV AL,25 ;下卷行数
MOV BH,70H ;卷入行属性
MOV CH,0 ;左上角行号
MOV CL,0 ;左上角列号
MOV DH,24 ;右下角行号
MOV DL,79 ;右下角列号
INT 10H
POP DI
POP SI
POP DX
POP CX
POP BX
POP AX
RET
CLEAR ENDP
CRLF PROC NEAR
PUSH AX
PUSH BX
PUSH CX
PUSH DX
PUSH SI
PUSH DI
MOV DL,0DH ;输出回车
MOV AH,02
INT 21H
MOV DL,0AH ;输出换行
MOV AH,02
INT 21H
POP DI
POP SI
POP DX
POP CX
POP BX
POP AX
RET
CRLF ENDP
CODES ENDS ;代码段结束
END START ;程序结束
